A kind of nanometer photocatalyst and preparation method thereof for environmental purification

A nano-photocatalyst and nano-crystal technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of no visible light activity, difficulty in recycling, The molecular structure is easy to tailor, etc., to achieve the effect of wide visible light response range, easy large-area assembly, miniaturization, and low price

Active Publication Date: 2020-12-01
湖州达立智能设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide has a large band gap and has no absorption properties for visible light mainly composed of sunlight, and is not active in visible light
[0003] Organic photocatalyst is a new type of photocatalyst, which has a molecular structure that is easy to tailor, and the energy band structure can be adjusted by simple means such as molecular structure functional group modification. It has a wider spectral response range and has a good response to visible light bands and even infrared bands. advantages, but it is difficult to recycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing a nano photocatalyst, comprising the steps of:

[0025] 1) Preparation of ternary sulfide nanocrystals: 100g TiCl 4 , 70g FeCl 3 , and 50g (NH4) 2 S was mixed with 200 g of ethylenediamine, placed in a hydrothermal reaction kettle, put into an oven, the reaction temperature was 150° C., and the reaction time was 20 hours, then cooled to room temperature, and the product ternary sulfide nanocrystals were separated;

[0026] 2) Surface modification of ternary sulfide nanocrystals: Disperse 90 g of ternary sulfide nanocrystals prepared in step 1) in 270 g of ethanol, then add 30 g of chloromethyltriethoxysilane to it, and stir at room temperature React for 2 hours, then centrifuge, then wash with ether and ethyl acetate for 5 times, and finally dry in a vacuum oven at 60°C for 12 hours;

[0027] 3) Preparation of photocatalyst: Disperse 90 g of surface-modified ternary sulfide nanocrystals prepared in step 2) in 270 g of dimethyl sulfoxide, and ad...

Embodiment 2

[0031] A method for preparing a nano photocatalyst, comprising the steps of:

[0032] 1) Preparation of ternary sulfide nanocrystals: 100g TiCl 4 , 70g FeCl 3 , and 50g (NH4) 2 S was mixed with ethylenediamine 230g, placed in a hydrothermal reaction kettle, put into an oven, the reaction temperature was 180°C, the reaction time was 23 hours, then cooled to room temperature, and the product ternary sulfide nanocrystals were separated;

[0033] 2) Surface modification of ternary sulfide nanocrystals: Disperse 120 g of ternary sulfide nanocrystals prepared in step 1) in 300 g of ethanol, then add 40 g of chloromethyltriethoxysilane to it, and stir at room temperature React for 3 hours, then centrifuge, then wash with ether and ethyl acetate for 6 times, and finally dry in a vacuum oven at 70°C for 14 hours;

[0034] 3) Preparation of photocatalyst: Disperse 120 g of surface-modified ternary sulfide nanocrystals prepared in step 2) in 300 g of N,N-dimethylformamide, and add 1,3...

Embodiment 3

[0038] A method for preparing a nano photocatalyst, comprising the steps of:

[0039] 1) Preparation of ternary sulfide nanocrystals: 100gTiCl 4 , 70gFeCl 3 , and 50g (NH4) 2 S was mixed with ethylenediamine 260g, placed in a hydrothermal reaction kettle, put into an oven, the reaction temperature was 190°C, the reaction time was 27 hours, then cooled to room temperature, and the product ternary sulfide nanocrystals were separated;

[0040] 2) Surface modification of ternary sulfide nanocrystals: Disperse 130 g of ternary sulfide nanocrystals prepared in step 1) in 400 g of ethanol, then add 50 g of chloromethyltriethoxysilane to it, and stir at room temperature React for 4 hours, then centrifuge, then wash with ether and ethyl acetate for 7 times, and finally dry in a vacuum oven at 80°C for 16 hours;

[0041]3) Preparation of photocatalyst: Disperse 135 g of surface-modified ternary sulfide nanocrystals prepared in step 2) in 400 g of N-methylpyrrolidone, and add 1,3,5-tr...

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PUM

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Abstract

The invention discloses a preparation method of a nano photocatalyst. The preparation method comprises the following steps of 1) preparing a ternary sulfide nano crystal; 2) modifying the surface of the ternary sulfide nano crystal; 3) preparing a photocatalyst; and 4) performing ion exchange. The invention further discloses a nano photocatalyst prepared according to the preparation method. The nano photocatalyst disclosed in the invention can respond to a broad range of visible light and has high photocatalystic activity and high stability.

Description

technical field [0001] The invention belongs to the technical field of new photocatalyst materials for environmental purification, and relates to a photocatalyst and a preparation method thereof, in particular to a nano photocatalyst with visible light response and a preparation method thereof. Background technique [0002] Photocatalysts can respond to sunlight or indoor light to absorb, decompose and remove environmental pollutants or have a self-cleaning effect on dirt attached to the surface of objects, and can realize the conversion of solar energy into chemical energy. A prerequisite for efficient solar photocatalytic conversion. Titanium dioxide is one of the typical photocatalysts with strong photocatalytic activity. However, titanium dioxide has a large band gap and has no absorption performance for visible light mainly composed of sunlight, and has no visible light activity. [0003] Organic photocatalyst is a new type of photocatalyst, which has a molecular stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C02F1/30
CPCB01J31/38B01J35/004B01J35/023C02F1/30C02F2305/10
Inventor 向红先
Owner 湖州达立智能设备制造有限公司
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